I'd like my body to be cremated and my ashes turned into diamond, LOL.
No but seriously, burial is a waste of good land that could have been used for housing, since many cemeteries tend to be near urban areas anyway. Also, this need not end the cemetery business. They can just allow mausoleums to house urns rather than coffins.
They don't seem to like it though. In the cemetery where our family has bought plots, there's a limit to how many urns can be placed in a mausoleum. To be fair to them though, they allow an urn in the plot even if you already have a coffin down there.
If cities don't have restrictions though, I'd rather just have an altar or alcove in the house to display all the urns. Less hassle during ceremonies.
Organs donated and the rest burned?
This option can be even much better. After death, you can give your healthy organs to the sick people who need it, and burn the rest.
And the remnants of the cremated body and make them cubic Zirconia. I heard that there is such a technology. It seems to me very convenient. No need for cemeteries. All generations can be stored in one vase.
Um, was that zirconia? I thought those were actual diamonds. I know there are hair diamonds for keepsakes so it's probably possible to turn the whole body's ashes into one.
Such a shame we can't be turned to glass. At first I though that was possible but when I checked online I only saw someone incorporating a few pinch of ash into glass bead.